<style>
     @media screen and (min-width: 1366px) {
        video{
            margin-left: -15%;
        }
    }
    @media screen and (max-width: 1366px) {
       video{
           margin-left: -49%;
           margin-top: -4%;
        }
    }
</style>
<div>
    <video src="http://image.prodrone-tech.com/cms/video/welcome.mp4" width="1200" height="500" autoplay="autoplay" ></video>
</div>

